Method for forming graphene and craphene oxide salt, and graphene oxide salt

Abstract

A first precipitate is formed by mixing graphite and an oxidizer containing an alkali metal salt in a solution. Next, a second precipitate is formed by ionizing the oxidizer which is included in the first precipitate, with an acid solution, and removing the oxidizer from the first precipitate. Then, a dispersion liquid in which graphene oxide is dispersed is prepared by mixing the second precipitate and water to form a mixed solution and then applying ultrasonic waves to the mixed solution or mechanically stirring the mixed solution, so that the graphene oxide is separated from graphite oxide that is the graphite which is included in the second precipitate and oxidized. Next, graphene oxide salt is formed by mixing the dispersion liquid, a basic solution, and an organic solvent and reacting the graphene oxide included in the dispersion liquid and a base included in the basic solution to each other.

1 . A method for forming graphene oxide salt comprising the steps of:
 forming a first precipitate by mixing graphite and an oxidizer containing an alkali metal salt in a solution;   forming a second precipitate by ionizing the oxidizer containing the alkali metal salt, which is included in the first precipitate, with an acid solution, and removing the oxidizer containing the alkali metal salt from the first precipitate;   forming a mixed solution by mixing the second precipitate and water;   separating graphene oxide from graphite oxide that is the graphite which is included in the second precipitate and oxidized by applying ultrasonic waves to the mixed solution or mechanically stirring the mixed solution, so that a dispersion liquid in which the graphene oxide is dispersed is formed; and   forming graphene oxide salt by mixing the dispersion liquid, a basic solution, and an organic solvent and reacting the graphene oxide included in the dispersion liquid and a base included in the basic solution to each other.   
     
     
         2 . The method for forming graphene oxide salt according to  claim 1 , wherein the oxidizer is nitric acid and potassium chlorate; sulfuric acid and potassium permanganate; or nitric acid, sulfuric acid, and potassium chlorate. 
     
     
         3 . The method for forming graphene oxide salt according to  claim 1 , wherein the acid solution is hydrochloric acid, dilute sulfuric acid, or nitric acid. 
     
     
         4 . The method for forming graphene oxide salt according to  claim 1 , wherein the basic solution is an aqueous sodium hydroxide solution, an aqueous pottasium hydroxide solution, an aqueous ammonia solution, a methylamine solution, an ethanolamine solution, a dimethylamine solution, or trimethylamine solution. 
     
     
         5 . The method for forming graphene oxide salt according to  claim 1 , wherein the organic solvent is acetone, methanol, or ethanol. 
     
     
         6 . A method for forming graphene oxide salt comprising the steps of:
 forming a first mixed solution containing a first precipitate having graphite oxide and an oxidizer by mixing graphite and the oxidizer in a solution;   forming a second precipitate containing the graphite oxide by collecting the first precipitate from the first mixed solution and then removing the oxidizer from the first precipitate with an acid solution;   forming a second mixed solution in which graphene oxide is dispersed by mixing the second precipitate and water and then applying ultrasonic waves to a mixed solution or mechanically stirring the mixed solution, so that the graphene oxide is separated from the graphite oxide; and   collecting graphene oxide salt by mixing a basic solution and an organic solvent with the second mixed solution and reacting the graphene oxide included in the second mixed solution and a base to each other to precipitate the graphene oxide salt.   
     
     
         7 . The method for forming graphene oxide salt according to  claim 6 , wherein the oxidizer is nitric acid and potassium chlorate; sulfuric acid and potassium permanganate; or nitric acid, sulfuric acid, and potassium chlorate. 
     
     
         8 . The method for forming graphene oxide salt according to  claim 6 , wherein the acid solution is hydrochloric acid, dilute sulfuric acid, or nitric acid. 
     
     
         9 . The method for forming graphene oxide salt according to  claim 6 , wherein the basic solution is an aqueous sodium hydroxide solution, an aqueous pottasium hydroxide solution, an aqueous ammonia solution, a methylamine solution, an ethanolamine solution, a dimethylamine solution, or trimethylamine solution. 
     
     
         10 . The method for forming graphene oxide salt according to  claim 6 , wherein the organic solvent is acetone, methanol, or ethanol. 
     
     
         11 . A method for forming graphene oxide salt comprising the steps of:
 forming a first precipitate by mixing graphite and an oxidizer containing an alkali metal salt in a solution;   forming a second precipitate by ionizing the oxidizer containing the alkali metal salt, which is included in the first precipitate, with an acid solution, and removing the oxidizer containing the alkali metal salt from the first precipitate;   forming a third precipitate containing graphite oxide salt by mixing the second precipitate and water, then mixing a basic solution and an organic solvent, and reacting graphite oxide that is formed by oxidizing the graphite, which is included in the second precipitate, and the basic solution; and   forming graphene oxide by mixing the third precipitate and water and separating graphene oxide salt from the graphite oxide salt included in the third precipitate.   
     
     
         12 . The method for forming graphene oxide salt according to  claim 11 , wherein the oxidizer is nitric acid and potassium chlorate; sulfuric acid and potassium permanganate; or nitric acid, sulfuric acid, and potassium chlorate. 
     
     
         13 . The method for forming graphene oxide salt according to  claim 11 , wherein the acid solution is hydrochloric acid, dilute sulfuric acid, or nitric acid. 
     
     
         14 . The method for forming graphene oxide salt according to  claim 11 , wherein the basic solution is an aqueous sodium hydroxide solution, an aqueous pottasium hydroxide solution, an aqueous ammonia solution, a methylamine solution, an ethanolamine solution, a dimethylamine solution, or trimethylamine solution. 
     
     
         15 . The method for forming graphene oxide salt according to  claim 11 , wherein the organic solvent is acetone, methanol, or ethanol. 
     
     
         16 . A method for forming graphene oxide salt comprising the steps of:
 forming a first mixed solution containing a first precipitate having graphite oxide and an oxidizer by mixing graphite and the oxidizer in a solution;   forming a second precipitate containing the graphite oxide by collecting the first precipitate from the first mixed solution and then removing the oxidizer from the first precipitate with an acid solution;   forming a third precipitate containing graphite oxide salt by mixing the second precipitate and water, then mixing a basic solution and an organic solvent, and reacting the graphite oxide, which is included in the second precipitate, and a base; and   forming a second mixed solution in which graphene oxide salt is dispersed by mixing the third precipitate and water, and then applying ultrasonic waves to a mixed solution or mechanically stirring the mixed solution, so that the graphene oxide salt is separated from the graphite oxide salt included in the third precipitate, and collecting the graphene oxide salt included in the second mixed solution.   
     
     
         17 . The method for forming graphene oxide salt according to  claim 16 , wherein the oxidizer is nitric acid and potassium chlorate; sulfuric acid and potassium permanganate; or nitric acid, sulfuric acid, and potassium chlorate. 
     
     
         18 . The method for forming graphene oxide salt according to  claim 16 , wherein the acid solution is hydrochloric acid, dilute sulfuric acid, or nitric acid. 
     
     
         19 . The method for forming graphene oxide salt according to  claim 16 , wherein the basic solution is an aqueous sodium hydroxide solution, an aqueous pottasium hydroxide solution, an aqueous ammonia solution, a methylamine solution, an ethanolamine solution, a dimethylamine solution, or trimethylamine solution. 
     
     
         20 . The method for forming graphene oxide salt according to  claim 16 , wherein the organic solvent is acetone, methanol, or ethanol. 
     
     
         21 . A method for forming graphene comprising the steps of:
 forming a first precipitate by mixing graphite and an oxidizer containing an alkali metal salt in a solution;   forming a second precipitate by ionizing the oxidizer containing the alkali metal salt, which is included in the first precipitate, with an acid solution, and removing the oxidizer containing the alkali metal salt from the first precipitate;   forming a mixed solution by mixing the second precipitate and water;   separating graphene oxide from graphite oxide that is the graphite which is included in the second precipitate and oxidized by applying ultrasonic waves to the mixed solution or mechanically stirring the mixed solution, so that a dispersion liquid in which the graphene oxide is dispersed is formed;   forming graphene oxide salt by mixing the dispersion liquid, a basic solution, and an organic solvent and reacting the graphene oxide included in the dispersion liquid and a base included in the basic solution to each other; and   forming graphene by reducing the graphene oxide salt.   
     
     
         22 . The method for forming graphene according to  claim 21 , wherein the oxidizer is nitric acid and potassium chlorate; sulfuric acid and potassium permanganate; or nitric acid, sulfuric acid, and potassium chlorate. 
     
     
         23 . The method for forming graphene according to  claim 21 , wherein the acid solution is hydrochloric acid, dilute sulfuric acid, or nitric acid. 
     
     
         24 . The method for forming graphene according to  claim 21 , wherein the basic solution is an aqueous sodium hydroxide solution, an aqueous pottasium hydroxide solution, an aqueous ammonia solution, a methylamine solution, an ethanolamine solution, a dimethylamine solution, or trimethylamine solution. 
     
     
         25 . The method for forming graphene according to  claim 21 , wherein the organic solvent is acetone, methanol, or ethanol. 
     
     
         26 . A method for forming graphene comprising the steps of:
 forming a first mixed solution containing a first precipitate having graphite oxide and an oxidizer by mixing graphite and the oxidizer in a solution;   forming a second precipitate containing the graphite oxide by collecting the first precipitate from the first mixed solution and then removing the oxidizer from the first precipitate with an acid solution;   forming a second mixed solution in which graphene oxide is dispersed by mixing the second precipitate and water, and then applying ultrasonic waves to a mixed solution or mechanically stirring the mixed solution, so that the graphene oxide is separated from the graphite oxide;   collecting graphene oxide salt by mixing a basic solution and an organic solvent with the second mixed solution and reacting the graphene oxide included in the second mixed solution and a base to each other to precipitate the graphene oxide salt; and   forming graphene by reducing the graphene oxide salt.   
     
     
         27 . The method for forming graphene according to  claim 26 , wherein the oxidizer is nitric acid and potassium chlorate; sulfuric acid and potassium permanganate; or nitric acid, sulfuric acid, and potassium chlorate. 
     
     
         28 . The method for forming graphene according to  claim 26 , wherein the acid solution is hydrochloric acid, dilute sulfuric acid, or nitric acid. 
     
     
         29 . The method for forming graphene according to  claim 26 , wherein the basic solution is an aqueous sodium hydroxide solution, an aqueous pottasium hydroxide solution, an aqueous ammonia solution, a methylamine solution, an ethanolamine solution, a dimethylamine solution, or trimethylamine solution. 
     
     
         30 . The method for forming graphene according to  claim 26 , wherein the organic solvent is acetone, methanol, or ethanol. 
     
     
         31 . A method for forming graphene comprising the steps of:
 forming a first precipitate by mixing graphite and an oxidizer containing an alkali metal salt in a solution;   forming a second precipitate by ionizing the oxidizer containing the alkali metal salt, which is included in the first precipitate, with an acid solution, and removing the oxidizer containing the alkali metal salt from the first precipitate;   forming a third precipitate containing graphite oxide salt by mixing the second precipitate and water, then mixing a basic solution and an organic solvent, and reacting graphite oxide that is formed by oxidizing the graphite, which is included in the second precipitate, and the basic solution;   forming graphene oxide by mixing the third precipitate and water and separating graphene oxide salt from the graphite oxide salt included in the third precipitate; and   forming graphene by reducing the graphene oxide salt.   
     
     
         32 . The method for forming graphene according to  claim 31 , wherein the oxidizer is nitric acid and potassium chlorate; sulfuric acid and potassium permanganate; or nitric acid, sulfuric acid, and potassium chlorate. 
     
     
         33 . The method for forming graphene according to  claim 31 , wherein the acid solution is hydrochloric acid, dilute sulfuric acid, or nitric acid. 
     
     
         34 . The method for forming graphene according to  claim 31 , wherein the basic solution is an aqueous sodium hydroxide solution, an aqueous pottasium hydroxide solution, an aqueous ammonia solution, a methylamine solution, an ethanolamine solution, a dimethylamine solution, or trimethylamine solution. 
     
     
         35 . The method for forming graphene according to  claim 31 , wherein the organic solvent is acetone, methanol, or ethanol. 
     
     
         36 . A method for forming graphene comprising the steps of:
 forming a first mixed solution containing a first precipitate having graphite oxide and an oxidizer by mixing graphite and the oxidizer in a solution;   forming a second precipitate containing the graphite oxide by collecting the first precipitate from the first mixed solution and then removing the oxidizer from the first precipitate with an acid solution;   forming a third precipitate containing graphite oxide salt by mixing the second precipitate and water, then mixing a basic solution and an organic solvent, and reacting the graphite oxide which is included in the second precipitate and a base;   forming a second mixed solution in which graphene oxide salt is dispersed by mixing the third precipitate and water, and then applying ultrasonic waves to a mixed solution or mechanically stirring the mixed solution, so that the graphene oxide salt is separated from the graphite oxide salt included in the third precipitate, and collecting the graphene oxide salt included in the second mixed solution; and   forming graphene by reducing the graphene oxide salt.   
     
     
         37 . The method for forming graphene according to  claim 36 , wherein the oxidizer is nitric acid and potassium chlorate; sulfuric acid and potassium permanganate; or nitric acid, sulfuric acid, and potassium chlorate. 
     
     
         38 . The method for forming graphene according to  claim 36 , wherein the acid solution is hydrochloric acid, dilute sulfuric acid, or nitric acid. 
     
     
         39 . The method for forming graphene according to  claim 36 , wherein the basic solution is an aqueous sodium hydroxide solution, an aqueous pottasium hydroxide solution, an aqueous ammonia solution, a methylamine solution, an ethanolamine solution, a dimethylamine solution, or trimethylamine solution. 
     
     
         40 . The method for forming graphene according to  claim 36 , wherein the organic solvent is acetone, methanol, or ethanol. 
     
     
         41 - 42 . (canceled)